v0.2.0 — Performance & Python 3.11+

What's New

Performance (5x faster)

• Parallel corpus generation — rules generate strings concurrently across all CPU cores
• Fork-based evaluation on Linux — workers inherit pre-compiled patterns via copy-on-write, eliminating serialization and recompilation overhead
• ~8s for 1,537 rules (down from ~38s)
• Spawn-based fallback on macOS/Windows

Optional RE2 acceleration

pip install crossfire-rules[re2]

Tries google-re2 first for 10-100x faster regex compilation, falls back to stdlib re for PCRE-only patterns (backreferences, lookahead). Works transparently with fork-based workers.

Python 3.11+ minimum

• Dropped Python 3.10 support
• StrEnum, datetime.UTC, tomllib (no tomli fallback)

Other improvements

• CROSSFIRE_WORKERS environment variable for worker count
• deque for BFS clustering (O(1) popleft vs O(n) pop(0))
• Early skip for zero-overlap pairs in classifier
• lru_cache on _pattern_complexity
• diff_corpora reuses evaluate_corpus (no redundant O(R×C) scan)
• Direct gen_duration timing instead of subtraction
• Worker failures raise RuntimeError instead of being silently swallowed
• CompiledPattern Protocol for type-safe re/re2 dual support
• mypy --strict enforced in CI
• README badges (CI, PyPI, Python, license)

Install / Upgrade

pip install --upgrade crossfire-rules

Full Changelog

v0.1.0...v0.2.0